ZC

Zhengwei Cai

OE Otis Elevator: 1 patents #966 of 1,840Top 55%
Overall (All Time): #3,718,671 of 4,157,543Top 90%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5641951 Elevator door safety device Masanori Nakamori 1997-06-24